6/6: Severe pulmonic stenoses (mp3) Loudest murmur that produces a palpable thrill still audible after stethoscope is removed from the chest.

Based on: Ettinger, S.J.-Feldmann E.C. (2010): Textbook of veterinary internal medicine. Diseases of the dog and cat, 7th ed., Saunders Elsevier , St. Luis. This grading system was adopted from the human cardiology, first described by Levine and Freeman in 1933